elang/base/analysis: |LivenessBuilder<Block, Variable>::AddVariale(variable)| to allow multiple call for same varaible to support non-SSA variable, e.g. physical register.
elang/base/analysis: |LivenessBuilder<Block, Variable>::AddVariale(variable)| to allow multiple call for same varaible to support non-SSA variable, e.g. physical register.

eval1749/elang,eval1749/elang,eval1749/elang,eval1749/elang,eval1749/elang